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Application of geo-microbial prospecting method for finding oil and gas reservoirs

Frontiers of Earth Science 2015年第1期9卷 40-50页

作者： m. A. Rasheed Syed Zaheer Hasan P. l. Srinivasa Rao Annapurna Boruah V.Sudarshan B. Kumar T. Harinarayana Petroleum Research Wing Gujarat Energy Research and Management Institute (GERMI) Gandhinagar Gujarat 382007 India Department of Applied Geochemistry Osnlaina University Hyderabad 500007India

microbial prospecting of hydrocarbons is based on the detection of anomalous population of hydrocarbon oxidizing bacteria in the surface soils, indicates the presence of subsurface oil and gas accumulation. The technique is based on the seepage of light hydrocarbon gases such as C1-C4 from the oil and gas pools to the shallow surface that provide the suitable conditions for the development of highly specialized bacterial population. These bacteria utilize hydrocarbon gases as their only food source and are found enriched in the near surface soils above the hydrocarbon bearing structures. The methodology involves the collection of soil samples from the survey area, packing, preservation and storage of samples in pre-sterilized sample bags trader aseptic and cold conditions till analysis and isolation and enumeration of hydrocarbon utilizing bacteria such as methane, ethane, propane, and butane oxidizers. The contour maps for the population density of hydrocarbon oxidizing bacteria are drawn and the data can be integrated with geological, geochemical, geophysical methods to evaluate the hydrocarbon prospect of an area and to prioritize the drilling locations thereby reducing the drilling risks and achieve higher success in petroleum exploration. microbial Prospecting for Oil and Gas （mPOG） method success rate has been reported to be 90%. The paper presents details of microbial prospecting for oil and gas studies, excellent methodology, future development trends, scope, results of study area, case studies and advantages.

关键词： hydrocarbon utilizing bacteria microbial prospecting micro-seepage petroleum exploration

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多晶质金刚石压模的断裂韧性和抗热性研究

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钨钼材料 1999年第2期 58-63,24页

作者： miess.,D rai.,G

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Fungal endophyte mediated occurrence of seminiferous and pseudoviviparous panicles in Festuca rubra

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Fungal Diversity 2014年第3期66卷 69-76页

作者： P.E.Gundel l.A.Garibaldi P.R.Wäli m.Helander S.Dirihan K.Saikkonen mTT Agrifood Research Finland Department of Plant ProductionJokioinenFinland IFEVA-CONICET-Faculty of Agronomy Buenos Aires University(UBA)Buenos AiresArgentina Sede Andina Universidad Nacional de Río Negro(UNRN)and Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Mitre 630CP 8400San Carlos de BarilocheRío NegroArgentina Department of Biology University of OuluOuluFinland Section of Ecology Department of BiologyUniversity of TurkuTurkuFinland mTT Agrifood Research Finland Plant Production Research31600 JokioinenFinland

Fungal endophytes are suggested to manipulate host grass *** different grass-endophyte combinations in a four year common garden experiment,we show that endophyte can retain control over the reproductive functions of the *** were collected as seeds from two different environments,meadows and *** endophyte infection(E+)increased reproductive effort of plants;13 and 15%higher proportion of E+plants produced panicles compared to naturally uninfected(E-)and manipulatively endophyte-infected(mE+)plants,*** E+plants produced also higher number of panicles compared to E-in the last two years,and both meadow-and riverbank-origin mE+plants produced higher number of panicles compared to mE-plants in most of the *** was recorded in 5%of the plants each *** limitation appears not to induce *** E+and mE+plants produced higher number of seminiferous panicles compared to E-and *** higher proportion of pseudoviviparism in mE+plants compared to E+,Eand mE-plants from meadows suggests specific genotypegenotype cross-talk between endophyte and *** was affected by year and primarily explained by plant reproductive effort since most vigorous plants produced more pseudoviviparous *** propose that endophytes can promote host grass reproduction in a habitatspecific manner and depending on genetic compatibility between ***,reproductive behavior depended on maternal habitat and the annual environmental conditions highlighting the importance of long-term experiments to estimate the effects of endophytes on host plant ecology.

关键词： Grass-endophyte interaction Systemic fungal endophytes Symbiosis Seminiferous panicles Pseudovivipary

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Nucleoside reverse transcriptase inhibitors and Kamuvudines inhibit amyloid-βinduced retinal pigmented epithelium degeneration

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Signal Transduction and Targeted Therapy 2021年第5期6卷 1526-1534页

作者： Siddharth Narendran Felipe Pereira Praveen Yerramothu Ivana Apicella Shao-bin Wang Kameshwari Ambati Shuichiro Hirahara Younghee Kim meenakshi Ambati Vidya l.Ambati Peirong Huang Akhil Varshney Yosuke Nagasaka Shinichi Fukuda Kirstie l.Baker Kenneth m.marion Jan m.Deussing Srinivas R.Sadda Bradley D.Gelfand Jayakrishna Ambati Center for Advanced Vision Science University of Virginia School of MedicineCharlottesvilleVAUSA Department of Ophthalmology University of Virginia School of MedicineCharlottesvilleVAUSA Aravind Eye Care System MaduraiIndia Departamento de Oftalmologia e Ciências Visuais Escola Paulista de MedicinaUniversidade Federal de São PauloSão PauloBrazil Center for Digital Image Evaluation CharlottesvilleVAUSA Doheny Eye Institute Los AngelesLos AngelesCAUSA molecular Neurogenetics Department of Stress Neurobiology and NeurogeneticsMax Planck Institute of PsychiatryMunichGermany Department of Ophthalmology David Geffen School of MedicineUniversity of California–Los AngelesLos AngelesCAUSA Department of Biomedical Engineering University of Virginia School of MedicineCharlottesvilleVAUSA Department of Pathology University of Virginia School of MedicineCharlottesvilleVAUSA Department of microbiology Immunologyand Cancer BiologyUniversity of Virginia School of MedicineCharlottesvilleVAUSA

Nonfibrillar amyloid-βoligomers(AβOs)are a major component of drusen,the sub-retinal pigmented epithelium(RPE)extracellular deposits characteristic of age-related macular degeneration(AmD),a common cause of global *** report that AβOs induce RPE degeneration,a clinical hallmark of geographic atrophy(GA),a vision-threatening late stage of AmD that is currently *** demonstrate that AβOs induce activation of the NlRP3 inflammasome in the mouse RPE in vivo and that RPE expression of the purinergic ATP receptor P2RX7,an upstream mediator of NlRP3 inflammasome activation,is required for AβO-induced RPE *** classes of small molecule inflammasome inhibitors—nucleoside reverse transcriptase inhibitors(NRTIs)and their antiretrovirally inert modified analog Kamuvudines—both inhibit AβOs-induced RPE *** findings crystallize the importance of P2RX7 and NlRP3 in a disease-relevant model of AmD and identify inflammasome inhibitors as potential treatments for GA.

关键词： degeneration activation upstream

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NUmERICAl SImUlATION OF BUBBlE FlOW INTERACTIONS

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Journal of Hydrodynamics 2009年第3期21卷 316-332页

作者： CHAHINE Georges l. DYNAFlOW INC. 10621-J Iron Bridge RoadJessup

Bubble flow interaction can be important in many practical engineering applications. For instance, cavitation is a problem of interaction between nuclei and local pressure field variations including turbulent oscillations and large scale pressure variations. Various types of behaviours fundamentally depend on the relative sizes of the nuclei and the length scales of the pressure variations as well as the relative importance of bubble natural periods of oscillation and the characteristic time of the field pressure variations. Similarly, bubbles can significantly affect the performance of lifting devices or propulsors. We present here some fundamental numerical studies of bubble dynamics and deformation, then a practical method using a multi-bubble Surface Averaged Pressure （DF-multi-SAP ） to simulate cavitation inception and scaling, and connect this with more precise 3-D simulations. This same method is then extended to the study of two-way coupling between a viscous compressible flow and a bubble population in the flow field.

关键词： cavitation bubble flow interaction numerical simulation

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Poling Effects of Dielectric and Optical Properties on Pb(Zn1/3Nb2/3)1-xTixO3 Crystal

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Journal of Rare Earths 2006年第Z1期24卷 166-168页

作者： Tu Chi Shun Wang Fu Tang Chien R R Hugo Schmidt V Chew l l Graduate Inst.of Applied Science and Engineering Fu Jen University Taipei 242 China Graduate Inst.of Applied Science and Engineering Fu Jen University Taipei 242 China Department of Physics Montana State University Bozeman MT 59717 USA Department of Physics Montana State University Bozeman MT 59717 USA Department of Mechanical Engineering National University of Singapore Singapore

Dipolar relaxation and dielectric/piezoelectric resonance in a (001)-cut Pb(Zn1/3Nb2/3)0.9Ti0.1O3 (PZNT10%) single crystal before and after electric (E)-field poling were presented. Dielectric permittivities were measured as functions of temperature, frequency and poling E-field strength. Frequency-dependent dielectric spectroscopy in the poled sample exhibits multiple piezoelectric resonances between 0.1 and 1 mHz, which can be described by the forced-damped-oscillator model. The resonant spectra show significant changes while phase transitions are taking place. The unpoled crystal shows almost no optical birefringence, indicating that the average structure symmetry is isotropic. Birefringence of the crystal is significantly enhanced by a prior E-field poling.

关键词： Pb(Zn1/3Nb2/3)1-xTixO3 dielectric permittivity phase transitions refractive indices

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Overexpression of the ThTPS gene enhanced salt and osmotic stress tolerance in Tamarix hispida

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Journal of Forestry Research 2022年第1期33卷 299-308页

作者： Peilong Wang Xiaojin lei Jiaxin lü Caiqiu Gao State Key laboratory of Tree Genetics and Breeding(Northeast Forestry University) Harbin 150040People’s Republic of China

Trehalose is a non-reducing disaccharide with high stability and strong water absorption properties that can improve the resistance of organisms to various abiotic ***-6-phosphate synthase(TPS)plays important roles in trehalose metabolism and *** this study,the full-length cDNA of ThTPS was cloned from Tamarix hispida Willd.A phylogenetic tree including ThTPS and 11 AtTPS genes from Arabidopsis indicated that the ThTPS protein had a close evolutionary relationship with ***,the function of At TPS7 has not been *** analyze the abiotic stress tolerance function of ThTPS,the expression of ThTPS in *** under salt and drought stress and JA,ABA and GA3 hormone stimulation was monitored by *** results show that ThTPS expression was clearly induced by all five of these treatments at one or more times,and salt stress caused particularly strong induction of Th TPS in the roots of *** ThTPS gene was transiently overexpressed in *** physiological indexes and staining results showed that ThTPS gene overexpression increased salt and osmotic stress tolerance in ***,the Th TPS gene can respond to abiotic stresses such as salt and drought,and its overexpression can significantly improve salt and osmotic *** findings establish a foundation to better understand the responses of TPS genes to abiotic stress in plants.

关键词： Trehalose-6-phosphate synthase(TPS) Tamarix hispida Salt tolerance Osmotic resistance

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Rogue wave light bullets of the three-dimensional inhomogeneous nonlinear Schrödinger equation

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Photonics Research 2021年第4期9卷 643-648页

作者： Jingsong He Yufeng Song C.G.l.Tiofack m.Taki Institute for Advanced Study Shenzhen UniversityShenzhen 518060China Intelligent Internet of Things and Intelligent manufacturing Center College of Electronics and Information EngineeringShenzhen UniversityShenzhen 518060China Faculty of Sciences University of MarouaMarouaCameroon Univ.lille CNRSUMR 8523-PhLAM-Physique des Lasers Atomes et MoleculesF-59000 LilleFrance

We discover single and homocentric optical spheres of the three-dimensional inhomogeneous nonlinear Schrödinger equation(NlSE)with spherical symmetry,which is a novel model of light bullets that can present a three-dimensional rogue *** isosurface of this light bullet oscillates along the radius direction and does not travel with the evolution of *** localized nature of rogue wave light bullets both in space and in time,which is in complete contrast to the traveling character of the usual light bullets,is due to the localization of the rogue wave in the one-dimensional *** present also an investigation of the stability of the optical sphere *** lower modes of perturbation are found to display transverse instabilities that break the spherical symmetry of the *** the higher modes,the optical sphere solutions can be classified as stable solutions.

关键词： inhomogeneous wave equation

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Effect of Solidification Condition and Carbon Content on the morphology of mC Carbide in Directionally Solidified Nickel-base Superalloys

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Journal of materials Science & Technology 2014年第12期30卷 1296-1300页

作者： X.W.li l.Wang J.S.Dong l.H.lou Superalloys Division Institute of Metal Research Chinese Academy of Sciences

Evolution of the morphology of mC carbides with the change of cooling rate and carbon content in two kinds of nickel-base superalloys, K417 G and DD33, has been investigated. The morphology of mC carbides evolves from faceted to script-like with increasing cooling rate. Varying the carbon content from 40X10-6 to 320X10-6, the morphology of carbides changes from blocky, rod-like into script-like. Scanning electron microscopy observation of deep-etched samples indicates that these carbides evolve from octahedral to dendritic and then into welldeveloped dendrites accordingly in a three-dimensional manner. The morphology evolution is discussed from the viewpoint of the preferential growth orientation of fcc crystals and the carbide growth rate during directional solidification.

关键词： Carbides morphology Directional solidification Three-dimensional microstructure Nickel-base superalloys

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Dietary fibre enrichment of supplemental feed modulates the development of the intestinal tract in suckling piglets

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Journal of Animal Science and Biotechnology 2020年第1期11卷 183-193页

作者： H.m.J.Van Hees m.Davids D.maes S.millet S.Possemiers l.A.den Hartog T.A.T.G.van Kempen G.P.J.Janssens Department of Nutrition Genetics and EthologyGhent UniversityMerelbekeBelgium Research and Development Trouw NutritionAmersfoortThe Netherlands Department of Internal and Vascular medicine Amsterdam University Medical CentreAmsterdamThe Netherlands Department of Reproduction Obstetrics and Herd HealthGhent UniversityMerelbekeBelgium IlVO Eenheid DierMelleBelgium BioActor MaastrichtThe Netherlands Animal Nutrition Wageningen University and ResearchWageningenThe Netherlands North Carolina State University RaleighNCUSA.

Background:Commercial pre-weaning diets are formulated to be highly digestible and nutrient-dense and contain low levels of dietary *** contrast,pigs in a natural setting are manipulating fibre-rich plant material from a young ***,dietary fibre affects gastrointestinal tract(GIT)development and health in older *** hypothesised that supplemental diets that contain vegetal fibres are accelerating GIT development in suckling piglets in terms of size and *** d 2 of life,sow-suckled piglets had access to a low fibre diet(CON),a diet with a fermentable long-chain arabinoxylan(lc-AXOS),a diet with a largely non-fermentable purified cellulose(CEll),or a diet containing both *** the initial 2 weeks,the control diet was a high-density milk replacer,followed by a dry and highly digestible creep *** weaning at 25 d,15 piglets from each treatment group,identified as eaters and originating from six or seven litters,were sacrificed for post-mortem examination of GIT morphology,small intestinal permeability and metabolic profile of the *** microbiota composition of the mid-colon was evaluated in a sub-set of ten ***:No major statistical interactions between the fibre sources were *** consumed the fibrecontaining milk supplements and creep diets *** size and small intestinal permeability was not *** intestinal fill was increased with lc-AXOS only,while relative large intestinal weight was increased with both fibre sources(Plso,CEll decreased ileal pH and tended to increase ileal Dm content compared to CON(Pmoreover,the concentration of volatile fatty acids was increased in the caecum(Pmidcolon(Ply stimulated caecal propionate(Pmicrobiota composition showed a high individual variation and limited dietary ***,CEll induced minor shifts in specific genera,with notable reductions of Escherichia-Sh

关键词： Dietary fibre Gut maturation Gut microbiota Suckling piglets

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